Create Room No overloaded Method Error

CheckPlayerNameAndRoom();
PhotonNetwork.player.name = playerName;
Hashtable setMapName = new Hashtable();
setMapName["MapName"] = allMaps[selectedMap].mapName;
setMapName["RoundDuration"] = roundDuration;
setMapName["GameMode"] = gameMode;
string[] exposedProps = new string[3];
exposedProps[0] = "MapName";
exposedProps[1] = "RoundDuration";
exposedProps[2] = "GameMode";
//Create new Room
PhotonNetwork.CreateRoom(newRoomName, true, true, maxPlayers, setMapName, exposedProps);